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Exotic-Invasive Plants

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  1. National Park Service U.S. Department of the Interior National Capital Region Network Exotic-Invasive Plants John Paul Schmit George Wright Society Meeting March 2011 E X P E R I E N C E Y O U R A M E R I C A

  2. Exotic Invasive Plants Questions Can we determine what makes some parks more vulnerable? Can we determine what areas in parks might be more vulnerable? Are there any species that show up in a certain type of habitat?

  3. Exotic Invasive Plants Data 5 networks (ERMN, MIDN, NCBN,NCRN, NETN) and 2 prototype parks (CACO, SHEN) List of the 33 worst exotic invasives (commonly found and problematic), plus any woody trees and shrubs Total of 65 species from 40 parks, 1623 plots, 3094 observations of exotic-invasive plants

  4. Invasives are Common in Forest Plots E X P E R I E N C E Y O U R A M E R I C A

  5. # of Exotic Species found per Park E X P E R I E N C E Y O U R A M E R I C A


  6. The Worst Plot: Fort Circle Parks –Washington D.C. 14 Exotic Species E X P E R I E N C E Y O U R A M E R I C A

  7. E X P E R I E N C E Y O U R A M E R I C A

  8. What Factors are Related to Differences in Exotic Invasives between Parks? • Park Area • Forested Area • % of Park Forested • Distance to nearest: • Park Boundary • Road • River • Elevation • 2009 Visitation • Latitude E X P E R I E N C E Y O U R A M E R I C A

  9. E X P E R I E N C E Y O U R A M E R I C A

  10. E X P E R I E N C E Y O U R A M E R I C A

  11. E X P E R I E N C E Y O U R A M E R I C A

  12. Exotic/Invasive Plants within Parks • Can we predict which plots are more likely to have exotic plants? • Examined 5 parks with 100+ plots (DEWA, FRSP, NERI, PRWI, SHEN) • Logistic regression • Predictors: • Distance to nearest: • Park Boundary • Road • River • Elevation E X P E R I E N C E Y O U R A M E R I C A

  13. What Predicts Invaded Plots? E X P E R I E N C E Y O U R A M E R I C A

  14. Predicting the Occurrence of Individual Species • What characterizes the parks where a species is found? • Where is the species found within parks? E X P E R I E N C E Y O U R A M E R I C A

  15. What Predicts Presence in Parks? E X P E R I E N C E Y O U R A M E R I C A

  16. What Predicts Lonicera japonica Invaded Plots? E X P E R I E N C E Y O U R A M E R I C A